Allen-Bradley 1734-IB8S 8-Channel Safety Input Module

Allen-Bradley 1734-IB8S is an eight-channel safety input module for the POINT Guard I/O safety family, designed to monitor eight independent safety devices such as E‑stops, interlocks, and door switches using 24 V DC safety signals. It provides eight current-sinking safety inputs with an on-state voltage range of 11–30 V DC, an off-state maximum of 5 V, and a minimum on-state current of 3.3 mA (typical around 3.5 mA per channel), enabling reliable fault detection in industrial environments. The module is rated IP20 and operates from −20 to 55 °C, making it suitable for typical factory floor installations; it supports IEC 61131-2 Type 3 safety inputs and delivers a response time of less than 16.2 ms for safety sensing. The IB8S offers eight isolated safety inputs on a single module, with no outputs or pulse-test channels, and is intended to be used on the POINT I/O safety bus in Rockwell Automation control systems (e.g., GuardLogix/CompactLogix architectures). For safety power considerations, the documentation notes derating guidance (maximum supply in the high-temperature range around 28.8 V, up to 30 V under certain conditions), ensuring correct system planning in temperature-variant environments. Overall, the 1734-IB8S provides a compact, reliable means to wire eight safety devices into a single POINT Guard I/O module, enabling clean, verifiable safety interlocks within a PLC-based safety architecture.